First I'd suggest that you find an exchange that doesn't ask that kind of stuff.
The second point would simply be to consolidate those UTXO's into a new address. Use a native segwit address (starts with a bc1q) if you are worried about quantum computers.
First I'd suggest that you find an exchange that doesn't ask that kind of stuff.
The second point would simply be to consolidate those UTXO's into a new address. Use a native segwit address (starts with a bc1q) if you are worried about quantum computers.